The phrase "a broad expression of" is correct and usable in written English.
It can be used when discussing a wide-ranging or inclusive representation of an idea, feeling, or concept.
Example: "The artist's work is a broad expression of the human experience, capturing emotions from joy to sorrow."
Alternatives: "a wide representation of" or "a comprehensive reflection of".
The protests evolved into a broad expression of anger against both the development plan and the tactics of the Islamist government and its leader.
Although the Bill of Rights is a broad expression of individual civil liberties, the ambiguous wording of many of its provisions such as the Second Amendment's right "to keep and bear arms" and the Eighth Amendment's prohibition of "cruel and unusual punishments"—has been a source of constitutional controversy and intense political debate.
This study revealed a broad expression of NFATc3 with a relative strong expression in intestine and lymphocytes.
I got my first part-time job by responding to a broad "expression of interest" ad placed by a well-known epidemiologist.
They pointed out that Nkx2.5 null mutants cause over-specification of cardiac progenitors and that the area of over-specification of cardiac progenitors appears to be a broad expression of early cardiac markers in the cardiac crescents.
Detailed information on the tissue distribution of the p110α and p110β isoforms is not available, although evidence for a broad expression of both isoforms has been presented [6] [9].
Platypus genes α/α, α2 and β, whose orthologues are usually expressed in the bone marrow of an adult human, were expressed in almost all platypus tissues tested, suggesting a broader expression of these genes in the monotreme lineage.
Mr. Bloomberg said his visit was part of a broader expression of gratitude for support he received from religious leaders and their congregations.
The initial protests, set off by fears of mad cow disease, quickly evolved into a broader expression of grievances against Mr. Lee's policies on education, the economy and other issues.
He had been in Sofia, Bulgaria, on Wednesday morning and wanted to stop by Istanbul to witness the protests, which started as an effort to save Gezi Park from destruction and morphed into a broader expression of dissatisfaction with the authoritarian tactics of Prime Minister Recep Tayyip Erdogan.
What began as a peaceful protest about the destruction of a park to make way for a shopping centre has turned into a broader expression of Turkish discontent.
